kernel/linux.git/drivers/dma/altera-msgdma.c, branch v5.15.208

dmaengine: altera-msgdma: make response port optional

2021-07-28T06:55:10+00:00

The response slave port can be disabled in some configuration [1] and csr + MSGDMA_CSR_RESP_FILL_LEVEL will be 0 even if transfer has suceeded. We have to only rely on the interrupts in that scenario. This was tested on cyclone V with the controller resp port disabled. [1] https://www.intel.com/content/www/us/en/programmable/documentation/sfo1400787952932.html 30.3.1.2 30.3.1.3 30.5.5 Fixes: https://forum.rocketboards.org/t/ip-msgdma-linux-driver/1919 Signed-off-by: Olivier Dautricourt Reviewed-by: Stefan Roese Link: https://lore.kernel.org/r/8220756f2191ca08cb21702252d1f2d4f753a7f5.1623898678.git.olivier.dautricourt@orolia.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: add OF support

2021-06-16T10:44:28+00:00

This driver had no device tree support. - add compatible field "altr,socfpga-msgdma" - register dma controller with of_dma_controller_register Reviewed-by: Stefan Roese Signed-off-by: Olivier Dautricourt Link: https://lore.kernel.org/r/7459635ba093d87b6bf12413cf7cfe09f6e3019b.1623251990.git.olivier.dautricourt@orolia.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: fix kernel-doc style for tasklet

2020-10-08T09:48:37+00:00

Commit 6752e40d669a ("dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API") updated driver to use new tasklet_setup() API but missed to update the documentation for the tasklet function. Fixes: 6752e40d669a ("dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API") Link: https://lore.kernel.org/r/20201007083113.567559-2-vkoul@kernel.org Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API

2020-09-18T06:48:10+00:00

In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly. Signed-off-by: Romain Perier Signed-off-by: Allen Pais Link: https://lore.kernel.org/r/20200831103542.305571-2-allen.lkml@gmail.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: Fix struct documentation blocks

2020-07-15T12:20:46+00:00

Fix some misspelling/description issues, demote non-kerneldoc header to standard comment block and provide a new description for msgdma_desc_config()'s 'stride' parameter. Fixes the following W=1 kernel build warning(s): drivers/dma/altera-msgdma.c:163: warning: Function parameter or member 'node' not described in 'msgdma_sw_desc' drivers/dma/altera-msgdma.c:163: warning: Function parameter or member 'tx_list' not described in 'msgdma_sw_desc' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'lock' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dev' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'irq_tasklet' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'pending_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'free_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'active_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'done_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'desc_free_cnt' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'idle' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dmadev' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dmachan' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'hw_desq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'sw_desq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'npendings' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'slave_cfg' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'irq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'csr' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'desc' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'resp' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:265: warning: Function parameter or member 'stride' not described in 'msgdma_desc_config' Signed-off-by: Lee Jones Cc: Stefan Roese Link: https://lore.kernel.org/r/20200714111546.1755231-8-lee.jones@linaro.org Signed-off-by: Vinod Koul

remove ioremap_nocache and devm_ioremap_nocache

2020-01-06T08:45:59+00:00

ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig Acked-by: Arnd Bergmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

dmaengine: altera: Use IRQ-safe spinlock calls in the error paths as well

2017-10-20T06:21:10+00:00

The patch edf10919 [dmaengine: altera: fix spinlock usage] missed to change 2 occurrences of spin_unlock_bh() to spin_unlock_irqrestore(). This patch fixes this by moving to the IRQ-safe call in the error paths as well. Fixes: edf10919 (dmaengine: altera: fix spinlock usage) Signed-off-by: Stefan Roese Reviewed-by: Sylvain Lesne [add fixes tag and fix typo in log] Signed-off-by: Vinod Koul

dmaengine: altera: fix spinlock usage

2017-09-28T07:41:46+00:00

Since this lock is acquired in both process and IRQ context, failing to to disable IRQs when trying to acquire the lock in process context can lead to deadlocks. Signed-off-by: Sylvain Lesne Reviewed-by: Stefan Roese Signed-off-by: Vinod Koul

dmaengine: altera: fix response FIFO emptying

2017-09-28T07:41:46+00:00

Commit 6084fc2ec478 ("dmaengine: altera: Use macros instead of structs to describe the registers") introduced a minus sign before a register offset. This leads to soft-locks of the DMA controller, since reading the last status byte is required to pop the response from the FIFO. Failing to do so will lead to a full FIFO, which means that the DMA controller will stop processing descriptors. Signed-off-by: Sylvain Lesne Reviewed-by: Stefan Roese Signed-off-by: Vinod Koul